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StgSharp.Common/Logic/Timing/TimeProvider.cs

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+//-----------------------------------------------------------------------
+//-----------------------------------------------------------------------
+//     file="TimeProvider.cs"
+//     Project: StgSharp
+//     AuthorGroup: Nitload Space
+//     Copyright (c) Nitload Space. All rights reserved.
+//     
+//     Permission is hereby granted, free of charge, to any person 
+//     obtaining a copy of this software and associated documentation 
+//     files (the “Software”), to deal in the Software without restriction, 
+//     including without limitation the rights to use, copy, modify, merge,
+//     publish, distribute, sublicense, and/or sell copies of the Software, 
+//     and to permit persons to whom the Software is furnished to do so, 
+//     subject to the following conditions:
+//     
+//     The above copyright notice and 
+//     this permission notice shall be included in all copies 
+//     or substantial portions of the Software.
+//     
+//     THE SOFTWARE IS PROVIDED “AS IS”, 
+//     WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, 
+//     INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
+//     FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. 
+//     IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, 
+//     DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 
+//     ARISING FROM, OUT OF OR IN CONNECTION WITH 
+//     THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+//     
+//-----------------------------------------------------------------------
+//-----------------------------------------------------------------------
+
+using StgSharp.Timing;
+
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.Linq;
+using System.Runtime.CompilerServices;
+using System.Threading;
+
+namespace StgSharp
+{
+    public static partial class StgSharp
+    {
+
+        internal static StgSharpTime mainTimeProvider = new StgSharpTime();
+
+        internal static TimeSourceProviderBase MainTimeProvider => mainTimeProvider;
+
+    }
+
+    public sealed class StgSharpTime : TimeSourceProviderBase
+    {
+
+        private static List<TimeSpanProvider> subscriberList = new List<TimeSpanProvider>(
+            );
+        private static long accuracy;
+        private static Stopwatch mainProvider = new Stopwatch();
+        private static Thread timeProvideThread;
+
+        internal StgSharpTime() { }
+
+        public static TimeSourceProviderBase OnlyInstance => StgSharp.MainTimeProvider;
+
+        public override sealed void StartProvidingTime()
+        {
+            if( mainProvider.IsRunning ) {
+                return;
+            }
+            mainProvider.Start();
+
+            //speed test
+            long totalMS, internalFrequncy = Stopwatch.Frequency;
+            for( int i = 0; i < 100; i++ ) {
+                totalMS = mainProvider.ElapsedTicks / ( internalFrequncy / ( 1000L * 1000L ) );
+                for( int t = 0; t < 10; t++ ) {
+                    if( totalMS < 1000 ) {
+                        subscriberList.Add(
+                            new TimeSpanProvider(
+                                100L, TimeSpanProvider.DefaultProvider ) );
+                    }
+                }
+            }
+            mainProvider.Stop();
+            subscriberList.Clear();
+            totalMS = mainProvider.ElapsedTicks / ( internalFrequncy / ( 1000L * 1000L ) ) / 100L;
+            accuracy = ( totalMS * 2 ) / 3;
+            mainProvider.Reset();
+            timeProvideThread = new Thread( new ThreadStart( ProvideTime ) );
+            timeProvideThread.Start();
+        }
+
+        public override void StopProvidingTime()
+        {
+            lock( mainProvider ) {
+                mainProvider.Stop();
+            }
+        }
+
+        public void Terminate()
+        {
+            lock( mainProvider ) {
+                mainProvider.Stop();
+            }
+        }
+
+        protected override sealed void AddSubscriberUnsynced(
+            TimeSpanProvider subscriber )
+        {
+            subscriberList.Add( subscriber );
+        }
+
+        protected override sealed void RemoveSubscriberUnsynced(
+            TimeSpanProvider subscriber )
+        {
+            subscriberList.Remove( subscriber );
+        }
+
+        private void ProvideTime()
+        {
+            long totalMS, internalFrequncy = Stopwatch.Frequency;
+            lock( mainProvider ) {
+                mainProvider.Restart();
+            }
+            while( mainProvider.IsRunning ) {
+                totalMS = mainProvider.ElapsedTicks / ( internalFrequncy / ( 1000L * 1000L ) );
+                if( subscriberList.Count == 0 ) {
+                    continue;
+                }
+                CheckSubscriberSemaphore.Wait();
+                List<TimeSpanProvider> toRemoveList = new List<TimeSpanProvider>(
+                    );
+                foreach( TimeSpanProvider subscriber in subscriberList ) {
+                    if( !subscriber.CheckTime( totalMS ) ) {
+                        toRemoveList.Add( subscriber );
+                        InternalIO.InternalWriteLog(
+                            $"Time subscriber {subscriber} is to be removed.",
+                            LogType.Info );
+                    }
+                    ;
+                }
+                if( toRemoveList.Count != 0 ) {
+                    foreach( TimeSpanProvider subscriber in toRemoveList ) {
+                        subscriberList.Remove( subscriber );
+                    }
+                }
+                CheckSubscriberSemaphore.Release();
+            }
+        }
+
+    }
+}